Outspoken general named Trump's top security adviser

By Jeff Mason and Patricia ZengerleWEST PALM BEACH, Fla./WASHINGTON (Reuters) - U.S. President Donald Trump on Monday named Lieutenant General Herbert Raymond McMaster as his new national security adviser, choosing a military officer known for speaking his mind and challenging his superiors.McMaster is a highly regarded military tactician and strategic thinker, but his selection surprised some observers who wondered how the officer, whose Army career stalled at times for his questioning of autho